* Decouple `relays/client-substrate` from `headers_relay`
* Remove `blocks_in_state` from `SyncLoopMetrics`
    This metric was only relevant for PoA <> Substrate bridge.
* Move `sync_loop_metrics.rs` to `relays/finality`
* Remove unused `SyncLoopMetrics::update()`
* Hook up SyncLoopMetrics to finality_loop
* Delete now unused `relays/headers`

Signed-off-by: acatangiu <[email protected]>

* Decouple the PoA bridge code from Rialto
* Remove Rialto PoA bridge code
* Remove relays/bin-ethereum code
* Remove relays/client-ethereum code
* Remove modules/ethereum code
* Remove modules/ethereum-contract-builtin code
* Remove PoA bridge documentation
* Remove primitives/ethereum-poa code
* Decouple Rialto from currency-exchange
* Fix building with runtime-benchmarks
* Fix should_encode_bridge_send_message_call test
    Because we removed some runtime modules/pallets, the
    substrate2substrate bridge pallet has a different index within
    the runtime so its calls have a different encoding.
    Update the test to use the new encoding.
* Update readme - no more PoA bridge
* Remove deployments/bridges/poa-rialto
    Also removes:
    - deployments/networks/eth-poa.yml
    - deployments/networks/OpenEthereum.Dockerfile
* Remove deployments/dev/poa-config
* Update deployments readme - no more PoA bridge
* Remove eth-related scripts
    Deletes:
    - deployments/networks/eth-poa.yml
    - scripts/run-openethereum-node.sh
* Remove poa-relay from gitlab-ci
* Dockerfiles to use substrate-relay as default
* Remove modules/currency-exchange code
* Remove primitives/currency-exchange code

Signed-off-by: acatangiu <[email protected]>

* Add relayer strategy

* Add default relayer strategy

* default relayer strategy

* expose relayer strategy

* fix compile

* fix compile

* docs

* Rename Relayer to Relay, keep RelayerDecide

* split `DefaultRelayerStrategy` into `AltruisticRelayerStrategy` and `RationalRelayerStrategy`

* Remove relayer mode

* Remove unused import

* Rename `RelayerStrategy` to `RelayStrategy`

* Add missing docs

* clippy

* clippy

* clippy

* clippy

* Revert `relayer_mode` and add `MixStrategy`

* Add `EnforcementStrategy`

* fix bug and simplify relay strategy

* Update message_lane_loop.rs

* Update messages_target.rs

* clippy

* clippy

* clippy

* clippy

* clippy

* clippy

* clippy

* fix test

* fix test

* test

test

test

fix test

* change const value visable

* Add docs

* Update docs

* Update docs 2

* Fix ci

* Fix spell check

* transactions mortality in message and complex relays

* logging + enable in test deployments

* spellcheck

* fmt

* substrate: d0f6c1c60da22e04dd25c2eca46ebfe6f1571af0
polkadot: dd4b2e6a34a08a01b876d14641e99e7011be3463
cumulus: 9379cd6c1863ea846ad6c6a8cbbc99848dd5d693

* fmt

* fixed lost refs

* spelling

* benckhmarks

* fmt

* Unify error enums in substrate and ethereum clients with `thiserror`

Related to https://github.com/paritytech/parity-bridges-common/issues/857

* Add license pre-amble

* rustfmt

* Fix spelling

* max call size <= 230 bytes

* fix benchmarks

* replace collective flip with babe randomness in Rialto

* fmt

* fix test

* resubmit strategy for Polkadot/Kusama

* spellcheck

* fmt

* register parachain relay subcommand

* revert cargo patch

* added basic test

* fmt

* token swap benchmarks

* spellcheck

* Upgrade `jsonrpsee` to v0.3

* whitespace

* fmt

Co-authored-by: Svyatoslav Nikolsky <[email protected]>

* Refactor logic

* Thanks svyatonik help, it compile

* Fix failed unit test

* Remove compile warning

* Rename

* Return result in pay_relayers_rewards

* Fix runtime compile issue

* Use MessageNonce

* Fix review issue

* Missing u64 replacement

* Revert return type changes

* Fix merge issue

* Remove useless clone

* Alter gitlab.

* Use substrate's rustfmt.toml

* cargo +nightly fmt --all

* Fix spellcheck.

* cargo +nightly fmt --all

* format.

* Fix spellcheck and fmt

* fmt?

* Fix spellcheck

Co-authored-by: Tomasz Drwięga <[email protected]>

* fix/ignore clippy

* --locked check && test

* RUSTC_WRAPPER="" for clippy-nightly, check-nightly, test-nightly

* Substrate: 63b32fbaa2764c0a8ee76b70cdfa0fcb59b7181f
Polkadot:  7229ab87acf5bc5d4d10655ad1a9819a1e317442
Cumulus:   d5284b0e78be3a18a3371103dd00449aceb082df

* rialto parachain runtime

* fixed tests

* add node + bump refs (not compiling yet):
Substrate:           630422d6108cbaaca893ab213dde69f3bdaa1f6b
Polkadot:            7229ab87acf5bc5d4d10655ad1a9819a1e317442
Cumulus:             5af2990cfd3711f86c7cb8606b22364208a5c32d
GrandpaBridgeGadget: c152c45ac331eb8ab40d956ab1d008d181810ef4

* fix compilation (collator is not working)

* more fixes

* fmt

* spellcheck

* fix warnings

* fix compilation

* fmt

* trigger CI

* trigger CI

* Revert "trigger CI"

This reverts commit a31f53cec47909817b31a48f3c9f1abd9321f72c.

* benchmarks

* fix benchmarks

* fix again

* Revert "Revert "trigger CI""

This reverts commit 1dea8b42ac8bca830dea982fd2613eb89d607a6c.

* Revert "Revert "Revert "trigger CI"""

This reverts commit 8fb74fa5eba483b7f6a3ce3e25a60757aef4c6bc.

* try fix

* lost lock file

* spellcheck

* try to disable sccache for cargo check

* Revert "Revert "Revert "Revert "trigger CI""""

This reverts commit f157461482d4c1d19156715c4b1ee2acb169531b.

* try to disable again

* disable sccache for test

* box large arguments

* benchmarks

* fix

* fix spelling

* Revert "fix spelling"

This reverts commit 972bdac6c0c854f9c31e00aca005f228bb4ccbb1.

* Revert "Revert "fix spelling""

This reverts commit 44ad4f06a322aafefdae34b59b94ef0729d0b6bb.

* token swap relay

* token swap subcommand fixes

* fmt

* removed debug traces

* removed commented code

* relay headers between Kusama and Polkadot

* relay messages between Kusama and Polkadot

* complex Kusama <> Polkadot relayer

* expose relayer_fund_account_id from messages pallet

* create relayers fund accounts on Kusama/Polkadot + some more fixes

* fmt

* fix compilation

* compilation + clippy

* compilation

* MAXIMAL_BALANCE_DECREASE_PER_DAY for K<>P header relays

* fmt

* deduplicate tests

* Update modules/messages/src/lib.rs

Co-authored-by: Tomasz Drwięga <[email protected]>

* extract storage_parameter_key function

* other grumbles

* fix

* fmt

Co-authored-by: Tomasz Drwięga <[email protected]>

* Add `OnMessageAccepted` config type

* Update actual weight

* Add unit test

* Update weight

* Remove old comment & update wrong test data

* Make ci happy

* Add lane_id param

* update test case

* Make log info more readable

* Use saturating_sub

* Update docs

* integrate token swap pallet into Millau runtime

* set OnDeliveryConfirmed callback in Millau runtime

* add some missing tests to encode_call

* fix tests

* use BABE to author blocks on Rialto (previously: Aura)

* removed extra script

* use bp_rialto::Moment

* fix tests

* Babe should control session end

* add parachain pallets to Rialto runtime

* add parachain pallets to rialto runtime + add parachains inherent data provider to node

* remove script again

* fmt

* allow unlicensed crates

* spellcheck

* fix compilation